Question

One year old books are sold for 280 and make a loss
of 30percent Theen cost price of those Books is -
​

Answer 1

Step-by-step explanation:

General Methods of Preparation of Haloalkanes

1. From Alcohols

In Groove’s method, ZnC12 is used to weaken the C-OH bond. In case of 3° alcohols, ZnC12 is not required.

The reactivity order of halogen acids is HI > HBr > HCl.

Darzen procedure is the best method for preparing alkyl halides from alcohols since both the by products (SO2 and HCl) are gaseous and escape easily.

Answer 2

Step-by-step explanation:

x*(100-30)/100= 280

so, x*70/100=280

x=280*100/70

x= 4*100

x= 400

hence the cost price of the book is rs 400

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